public class Code {
    public static void main(String[] args) {
        //test();
        int sum = 0;
        int fact = 1;
        for (int i = 1; i <= 5; i++) {
            fact *= i;
            sum += fact;
        }
        System.out.println(sum);
    }
    public static void test()
    {
        for (int i = 1; i <= 1000; i++) {
            int sum = 0;
            for (int j = 1; j <= i / 2; j++) {
                if (i % j == 0) {
                    sum += j;
                }
            }
            if (sum == i) {
                System.out.println(i);
            }
        }
    }
}